Solar cell



FIG. 1 is a top plan view of a solar cell;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view of an alternative embodiment of a solar cell;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a front view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a left side view thereof; and,

FIG. 12 is a right side view thereof. 

The ornamental design for a solar cell, as shown and described. 